Salinity is a term much used in water conservation and is defined as the total mass in grams of salts dissolved in a 1-kg water sample. you are told to prepare a solution of 75 parts per thousand salinity (75 g of salts per kg of solution) to test the effect on food crops of irrigating farmland with high salinity river water. The solution contains twice as many moles of dissolved NaCl as dissolved mgso4, and three times as many moles of LiCl as NaCl. These are the only solutes. what masses of NaCl, MgSO4, and LiCl are contained in 7500 kg of this solution?